Phosphonite or phosphonate compounds and use thereof
Phosphonite and phosphonate compounds ##STR1## wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are each independently a group of the formula ##STR2## wherein R is a hydrogen atom or a methyl group, p is 0 or 1, q is independently 0 or 1 with regard to each repeat unit, and m is an integer of 2 to 10, a stabilizer for organic materials comprising said compound and a stabilized organic material comprising said compound. The compound of the present invention is less volatile at high temperatures. The use of the compound of the present invention as a stabilizer for organic materials affords an extremely useful organic material which is superior in heat stability and free of degradation caused by oxidation. The compound of the present invention has excellent compatibility with the above-mentioned organic materials and hardly migrate from the organic materials. Thus, the compound of the present invention can reside in the organic material for a prolonged period of time, which in turn stabilizes the organic materials in a sustained manner.
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Claims
1. A compound of the formula ##STR19## wherein X.sup.1, X.sup.2 and X.sup.4 are each independently a group of the formula ##STR20## wherein R is a hydrogen atom or a methyl group, X.sup.3 is independently, with regard to each repeat unit, a group of the formula ##STR21## wherein R is a hydrogen atom or a methyl group, p is 0 or 1, q is independently 0 or 1 with regard to each repeat unit, and m is an integer of 2-10.
2. A compound of the formula (II) ##STR22## wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4 and X.sup.5 are each independently a group of the formula ##STR23## wherein R is a hydrogen atom or a methyl group, and p, q and r are each independently 0 or 1.
3. A compound of the formula (III) ##STR24## wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4 and X.sup.5 are each independently a group of the formula ##STR25## wherein R is a hydrogen atom or a methyl group, and p, q and r are each independently 0 or 1.
3825629 | July 1974 | Hofer et al. |
3928510 | December 1975 | Hofer et al. |
3954847 | May 4, 1976 | Hofer et al. |
3962175 | June 8, 1976 | Hofer et al. |
4075163 | February 21, 1978 | Hofer et al. |
4115639 | September 19, 1978 | Brown et al. |
4261880 | April 14, 1981 | Fujii et al. |
4952649 | August 28, 1990 | Kioka et al. |
5109043 | April 28, 1992 | Bohshar et al. |
5300257 | April 5, 1994 | Akashi et al. |
5342869 | August 30, 1994 | Stoll et al. |
1 372 528 | October 1974 | GBX |
2 215 727 | September 1989 | GBX |
2 227 490 | August 1990 | GBX |
2 276 387 | September 1994 | GBX |
- Kaminsky et al., Journal of Polymer Science: Polymer Chemistry Edition, vol. 23, pp. 2151-2164 (1985).
Type: Grant
Filed: Dec 27, 1995
Date of Patent: Dec 30, 1997
Assignee: Yoshitomi Pharmaceutical Industries, Ltd. (Osaka)
Inventors: Tetsuji Ike (Fukuoka), Takeshi Inoue (Fukuoka), Yoshihiro Ozaki (Osaka)
Primary Examiner: Sharon Gibson
Assistant Examiner: Deanna Baxam
Law Firm: Wenderoth, Lind & Ponack
Application Number: 8/579,256
International Classification: C08J 300; C07F 902;